Wire-jerk-line shock absorber



F. R-EDICK WIRE JERK LINE SHOCK ABSORBER Nov. 29, 1927.

Filed Jan. l9l 1927 2 Sheets-Sheet l 2 Sheets-Sheet 2 Filed Jan. 19. 1927 F REDICK WIRE JERK LINE SHOCK ABSORBER L @M W.

Nov. 29, 192 7.

23 Inventor aw/r FedzZr/f,

Attorney Patented Nov.

This invention drlllmg rigs and FRANK nnmox, or PARKERTON, WYO ING.

PATENT, OFFICE.

WIRE-JERK-LINE SHOCK ABSORBER.

Application filed January 19, 1927.

relates generally to well has more particular reference to a wire jerk line shock absorber for use exclusively during the spudding operation or the actual starting of the hole and continues inv use until the well is of such depth to permit the using of the walking beam in the regular The primary object in the provision manner.

of the invention resides means for eliminating terrific jar and strain to the drill rig crank pin and band wheel shaft when using a wire jerk line and drilling line to spud in with.

During the spudding operation, wire rope has now taken place of the manila rope almost exclusively and this imposes a tremendous strain equipment in the starting of a Well. device placed on and jerk on the drilling This eliminates this objectionable feature attendant to the use of wire drilling and jerk lines for the actual starting of the well. n

A further object of the invention is to provide an absorber of this character that is relatively simp that may be installed at any part of drill rig without cost thereof.

and one the materially adding to the is of construction,

Other objects will become apparent as the nature of the invention is the same comprising the better understood, novel form, combination, and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings wherein like reference characters indicate corresponding parts throughout the several v1ews:

Figure 1 of a portion of a is a fragmentary s1de elevation well rig, the drilling crank wrist pin being equipped with an absorber constructed in accordance with invention.

Flgure 2 1s a the present detail longitudinal section of the absorber per se.

Figure 3 1s a transverse section taken substantially upon the line 3-3 of Figure 2.

Figure i is a perspective of one element of the absorber, and

Figure 5 is a transverse stantially upon the section taken subline 5-5 of said Figure 2.

Now having particular reference to the drawing, 5 indicates fragmentarily the conventional standar the upper end of the band wheel is keyed the con d of a well drilled rig upon which is suitably journalled shaft 6 to the end of Which ventional drilling crank 7 the drilling rig crank Serial No. 162,125. I

equipped with a wrist pin 8. My invention per se consists of an absorber for the Wire jerk line A that consists of a main body 9 of angular formation, and preferably in the form of a single casting. This body 9 is formed transversely with an opening Within which is an anti-friction bearing 10 through which said pin 8 of the drilling crank 7 is arranged.

At opposite sides of the bearing 10 of said body 9 and at right angles thereto, this body is formed with a pair of parallel bores 1111 within which are arranged circular bushings 12 12. Slidably arranged within these bushings are relatively elongated bolts 13 13 threaded at their opposite ends as disclosed in Figure 2 for a purpose hereinafter more fully described. i

The absorber further consists of a some what elongated cylinder 15 closed at one end and provided at this end with a plate 16, the ends of which are formed with open ings 1717 through which certain ends of the bolts 13-13 are arranged and secured therein by reason of nuts 1 818. As disclosed more clearly in Figure 2 when the cylinder is attached to the bolts the same will be arranged between the bolts and in parallelism therewith. Arranged within the cylinder is a relatively strong eXpa-nsible' 19 that bears at one end against the closed end of the cylinder and at its opposite against the body 9 previously described.

Arranged upon the opposite ends of the bolts 1313 is a cross head 20 that is secured to the bolts by reason of nuts 21-21. Surrounding the bolts 13-13 between the body 9 and said head 20 are-elongated spacing sleeves 22-22 for the purpose of limiting the inward movement of the head with respect to said body. This head 20 carries at its outer end a curved and channeled finger 23 around which the wire erk line A is disposed as in Figures 1 and 2.

The top side of the body 9 is of cup-like spring formation as at 24 while communicating oil well terriflic jar pin and wire and strainto thedrill rigcrank pin' and band Wheel shaft will be eliminatedand by reason of the simple construction of the-device- "with the ;wr1st scribed the inventionas consisting-of cer-tain detail structural elements it is nevertheless to} be understood thatsome -*'cha'nges my be inade tlierein w it'hdiitefl'ectingthe-spirit and scopfof' the appended claims.

=-Having thus described 'the invention; What I claim is P- "lfllnua wire erk line shock absorber for well drilling rigs,' a may loosely mounted upofi the drilling crankwristl pin of'the rig, a pair of bolts slidably arranged through bearings in-said bodyg- IHGMIS associatedwith eei-tain ends offthe bolts forfacilitating the attaclnnentmfthe jerk linetlie'reto, and expansi-ble spring means between 'the body and the' opposite "ends of the bolts for normally "drawingsaid' jeileline attaching means to- W'ard-"said body'butto perniit the same to move ic'orwardly with "respect thereto in overcoming shocksincid'ent to't'he operation "ofthe rig. V

7 2. In a' 'shock absoi'berforwvire jerklines 0f well drilling "rigs; av body adapted to be 'loosly inou'nite'd"upon the drilling crank wrist pin; a bolt slidable through the body, means upon one end of? the boltto facilitate the attachment of a jerk line thereto, and means between the oppositeendofthe bolt and said body for normally drawing the --jerk line toward-said body.

3. In a shock absorber of the character 7 ends of the 1 -b o'lts a-n'd' i the body for normally urging '-the spacing sleeves towar'd tl1 -bOCly. *4. 111 a "shock ill sorber bf the character described; apa'ir-of spaced elongatedbolts,-

a body through which said b0lts-are sli-tla ble, a ,jerk line attaching head niouinted on a the bolts at one end thereof; spacing sleeves arranged on the bolts 'between I the headand 7 said body,- and means "between the {opposite ends ofithe bolts and the -'-'bo dy for *norrnal'l urging the spacing sleevestowar'd the body, said last mentioned nieans coinprising cylinder closed at itsonter-end and disposed betweentheibolts;the olosedouterend o'f'the cylinder being secured -on the ends "offt'he bolts, and" an expan'si'ble coil springhaving one end thereof extending" into I the cylinder for engagement with the closed end thereof,

the other end of the expansible coil' being in engagement with said body.

In testimonywhereof Iaiiix lily-signature.

spring 

